Quantum Materials Corp. (fka QTMM)

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One-pot facile decoration of CdSe quantum dots on graphene nanosheets: novel graphene-CdSe nanocomposites with tunable fluorescent properties

Journal Article
Yi Wang, Hong-Bin Yao, Xiao-Han Wang and Shu-Hong Yu
J. Mater. Chem., 2010, Advance Article

DOI: 10.1039/C0JM02223C , Paper

Abstract

Fluorescent graphene-CdSe quantum dot (QD) (G-CdSe) nanocomposites with tunable optical properties can be prepared by a one-pot facile decoration of CdSe QDs on graphene nanosheets. The formation of such nanocomposites is based on the interaction between the surfactants on the surfaces of the synthesized graphene and the CdSe QDs through electrostatic interactions and van der Waals forces of the long chain alkane surfactants. PXRD, TEM and PL spectra have been acquired to demonstrate the successful decoration of CdSe QDs on graphene nanosheets. This kind of nanocomposite may have potential applications in bio-imaging and light emitting devices in the future.
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This represents a hybrid QD of G-CdSe, the marriage of
Graphene with CdSe. Of note, the supplemental material
showed less flourescense from the new molecule than for
a CdSe QD alone.

The Fluorescence Quantum Yields of the G-CdSe is about 50%
of that of the CdSe quantum dots.